Senior AI / Software Engineer
From: Japan
Location: Fukuoka, JP
On Useme since 19 November 2025
About me
AI Full-Stack Architect | LLMs, Voice Agents, Automation Systems, RAG, Realtime Platforms
I’m a hands-on AI + Full-Stack Engineer with 7+ years of experience building end-to-end, scalable AI applications — not just coding features, but owning product architecture, strategy, and delivery.
From building real-time prediction systems and AI tutor MVPs to architecting multi-tenant SaaS RAG platforms, I specialize in shipping LLM-powered, production-grade tools fast and independently.
🔧 My Stack & Strengths: AI/LLM & RAG Systems: LangChain, LlamaIndex, GPT-4/4o, Claude, embeddings, semantic + hybrid search Voice AI & Chatbots: ElevenLabs, Vapi, Retell, HeyGen, D-ID, SSML, conversation UX, WebRTC Backend/Infra: Python, FastAPI, Node.js, Supabase, Firebase, PostgreSQL, Docker, Redis, AWS/GCP Frontend: React, Next.js, TypeScript, Tailwind, Streamlit, Framer, responsive design Automation & Agents: n8n, Make.com, Zapier, CrewAI, OpenAI Assistants, webhook APIs, triggers Payments & Auth: Stripe (subscripti